While we totally adored this duo's lunch dates, it seems Amanda Seyfried and Ryan Phillippe have ended their short-lived romance.  According to US Weekly, Seyfried, 25, and Phillippe, 36, have called off their three-month relationship.

“They are not dating anymore," a source reveals to the magazine, "And it’s not a big deal for either of them.”

Rumors circulated that Phillippe was attempting to hit on Rihanna, 22, at the Gucci/Roc Nation brunch at L.A.'s Soho House on February 12th -- interesting!

Related Article: Amanda Seyfried + Ryan Phillippe are Los Feliz Lovers!

The Red Riding Hood hottie, who has been spotted moving in to her new Hollywood home this week, told X17Online.com photographers that the Ryan & Rihanna story is completely false though!

When asked about the Cruel Intentions actor, she said, "Oh, he's a nice guy -- we're friends. And that Rihanna story is not true. That is so f*cking not true!" Yikes!  Watch X17's video for yourself:

So, what do you think? What's really going on with Ryan and Amanda -- and Rihanna for that matter!